Diagnostic Mode, My iPod Classic doesn't have a FW Jack

Hi,


I'm experiancing a problem with my iPod Classic 6th Generation. I beleive (due to some research) that it may have some bad sectors because it repetitavely crashes iTunes during sync on random songs. I tried doing it in small chunks but it didn't seem to make a difference.


I tried Diagnostic Mode and I have gotten to the point where it's at the Accessorize Test. It says on the screen;


LCD=2


FW_DETECT=0

USB_DETECT=1

Please plug FW


I beleive FW means Fire Wire but I have no signs of a Fire Wire jack. I've tried everything and I'm stuck on this part.


Any help appreciated, I just don't want to know if you're having the same experiances as me 🙂


Thanks,

Zach

iPod classic, Mac OS X (10.5)

Posted on Jun 10, 2011 8:56 AM

Reply
Question marked as Top-ranking reply

Posted on Jun 10, 2011 6:31 PM

Your computer might not have a FireWire port and even if it does, it's no use unless you have a FireWire iPod cable. Skip the test or reset your iPod and do manual tests, which in any case will be more informative.


Check your iPod with Diagnostics Mode

It's possible that your iPod's hard drive has started to fail. Take your iPod and place your right thumb on the centre SELECT button and your left on the top MENU button. Press down both thumbs for about 6 seconds until your iPod reboots. Immediately move your left thumb around to the rewind button |<< on the left and hold this down together with SELECT for a further 6 seconds. Your iPod should now switch into Diagnostic Boot mode. Press MENU for Manual Test, then select IO > HardDrive > HDSMARTData to reveal your stats. For comparison here is a sample of mine from 6th Generation Classic after I'd had it for about 2 years.

Retracts: 889
Reallocs: 12
Pending Sectors: 0
PowerOn Hours: 2202
Start/Stops: 894
Temp: Current 24c
Temp: Min 10c
Temp: Max 50c

Take a note of your results. When finished press SELECT & MENU for 6 seconds to reset the iPod again.


With modern disc drives sectors are no longer marked bad by a disc scan, if the SMART firmware detects a sector it has trouble accessing it will attempt to invisibly reallocate it to a spare area of the disc.


Note that I've only 12 remapped sectors and none pending. To help explain what the numbers mean here is an extract from the Wikipedia S.M.A.R.T.article:

Reallocated Sectors Count
Count of reallocated sectors. When the hard drive finds a read/write/verification error, it marks this sector as "reallocated" and transfers data to a special reserved area (spare area). This process is also known as remapping, and "reallocated" sectors are called remaps. This is why, on modern hard disks, "bad blocks" cannot be found while testing the surface – all bad blocks are hidden in reallocated sectors. However, as the number of reallocated sectors increases, the read/write speed tends to decrease. The raw value normally represents a count of the number of bad sectors that have been found and remapped. Thus, the higher the attribute value, the more sectors the drive has had to reallocate.


Pending sector count
Number of "unstable" sectors (waiting to be remapped, because of read errors). If an unstable sector is subsequently written or read successfully, this value is decreased and the sector is not remapped. Read errors on a sector will not remap the sector (since it might be readable later); instead, the drive firmware remembers that the sector needs to be remapped, and remaps it the next time it's written.

Large numbers of Reallocs or Pending Sectors would suggest your drive is failing and that you may need to repair or replace your iPod. Check your stats after another attempt to update your iPod. If the numbers increase that again points to hard drive failure. While it won't be good news at least you'll know it isn't some random software problem and you can decide what to do next.


tt2

104 replies

Jun 11, 2011 4:44 AM in response to ZUsher

The reallocated sector count is possibly not the most useful statistic as these are sectors that, in principle, have been remapped and now work properly. How many pending sectors do you have? Restoring the device should release these so they can be remapped but it doesn't always happen and if there is an active difficult/impossible to read sector holding important data like part of the iPod's database or a folder then the device won't work properly. You may find it helps to reformat the iPod's drive before using iTunes to restore it.


tt2

Mar 18, 2012 1:03 PM in response to das_ist

I can't say for certain, but your symptoms would suggest that sometimes it is taking the iPod a few goes to read the next chunk of data. It is not so bad that it can't read the data at all which is why your stats don't look that bad, but they don't always read at the first attempt causing the delay. If the drive is highly fragmented that can also intoduce delays into the reading process.


tt2

Jun 2, 2012 6:39 AM in response to Ms.K.Hill

Same advice as I gave Corey5390 really:


Try the formatting fix from earlier in this thread. This should release the pending sectors. If the drive is stable then a full format should map out all of the bad sectors, and once done a restore should be successful.


If the iPod won't restore properly, or take your media, then there really isn't much else I can suggest. Main options are replacing the drive, or purchasing a new device.


tt2

Jun 12, 2012 5:06 AM in response to turingtest2

Retracts: 8

Reallocs: 3024

Pending Sectors: 192

PowerOn Hours: 87

Start/Stops: 28017

Temp: Current 31c

Temp: Min 6c

Temp: Max 57c


So I have problems with my 1,5 year old Classic 160Gb...
iPod wouldn't play some songs. It would get a few seconds into a song, then skip to a different one. After the hardreset it synced only 297 songs and I have an error message (-53, -50, -60) 😟

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Diagnostic Mode, My iPod Classic doesn't have a FW Jack

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